Valve lock



Dec. 4, 1928.

J. WASELAK VALVE LOCK Filed sept. 10, '1927 Patented Dec. 4, 1928.

JOSEPH lWASELAK, or MiNNiiaPopis, iviiiiiiEscriA.`

VALVE Loox;

Application led September 10,1927. Serial No 218,826.

My present invention has for itsobject to provide a simple and highlyefficient valve lock intended for general use, but especially adaptedfor locking the valve in a gas range or stove to prevent the same frombeing accidentally opened and especially to prevent a child from openingSuch a valve.

To the above end, generally stated, the in- 'vention consists of thenovel devices and comle binations of-devices hereinafter described anddefined in the claim.

In the accompanying drawings, Which illustrate the invention, likecharacters indicate like parts throughout the several views.k

Referring to the drawings:

Fig. 1 is a perspective vieu7 of the improved valve lock;

Fig. 2 is a plan vieW showing the valve lock applied to a valve of thetype commonly vused :in on a gas range or stove;

Fig. 3 is a View partly in elevation and partly in section taken .on theirregular line 3-3 of Fig. 2; and

Fig. 4 is a fragmentary view partly in elevation and partly in sectiontaken on the line 4`4 of Fig. 2.

The numeral 5 indicates a plug valve of the type commonly used in gasranges and stoves and the numeral 6 indicates the casing thereof. Thiscasing 6 is interposed in a gas feed pipe 7 and attached thereto byhaving on its sides a pair of diametrically opposite nipples 8 screwedinto the sections of said pipe.

Secured to the valve 5 is a radial pin 9 which extends into a notch ofthe casing 6 for engagement With aV stop shoulder 11 at one end of saidnotch to limit the closing movement of the valve 5, and a stop shoulder12 at the other end of said notch. to limit the opening movement of thevalve 5.

The improved lock includes a box-like body 13 having an open end and apair of loop-like attaching straps 14, the ends of which are adjustablyattached by nut-equipped screws v15 to the bodies thereof. These straps14 are adapted to be applied around the nipples 8, as best shown inFigs. 2 and 3, for rigidly but detachably connecting the body 13 to thecasing 6.

A thumb piece 16 is loosely fitted in the body 13 and attached theretoby a horizontal pivot pin 17 at the open end of the body 13.

On the pivoted end of t-he thumb piece 16 is a lock lug 18, the back ofWhich forms a cam 10 in the upper end surface 19. .Formed with theupperend of the lock lug' 18 is a lateral extension 20. A coil Spring 21is compressed between the bottom of the body 13 and the thumb piece 16.This spring 21 yieldingly lioldsthe thumb piece 16 raised with the locklug 18 extending into the path of movement of theV pin 17 and with theextension 20 Y the stop shoulder 12 as an abutment. When the valve 5 isclosed, its pin 9 projects between the stop shoulder 11 and the lock lug18, as best shown vin F ig.2, and thereby securely holds the valve 5closed so that it cannot be turned in either' direction. An attempt toopen the valve 5 Will cause its pin 9 to engage the lock lug 18 which issecurely held by the shoulder v12 to resist such pressure.

To release thelock so that the valve 5 may be opened the operator placeshis forefinger under the body thumb piecev16 and applies suicieiitpressurev to move the thumb piece 16 into the body 13 -againstthetension of the spring 21 and thereby retract the lock lug` 18 from thepath of movement of the pin 9 to permit the valve 5 to be opened.Afterthe valve is opened and the thumb piece l'releas'ed, the spring 21Will lift the thumb again position the lock lug 18 in the lpath ofmovement of the pin 9. When the valve5 is open, its pin 9 extends underas best shown in Fig. 4. I

During the closing movement of the valve 5 its pin 9 engages the camsurface 19V and thereby moves the lock lug 18 against the tension of thespring 21 out of its path of movement. As soon as the pin 9 has passedthe cam surface 19 the spring 21 Will immediately return the thumb piece16 and the parts carried thereby to normal postion and automaticallylock the valve closed.

The above ,described lock may be very quickly applied to a valve casingand it is evident that it Will securely hold a valve from beingaccidentally opened or from being opened by a child. The body 13securely protects the thumb piece 16 against accidental movement.

What I claim is; f

A lock of the kind described comprising a boXlike body having an opentop and an open end, said body having at its open end attaching meansfor Securingthe same to the casing of a valve provided with a stop pinthe extension 20,

positioned to engagev 13 With his thumb on the,V

piece 16 and v workin "between a air .of stop shoulders valveclosed,said lock lnghaving a lateral on sai casing, said ody having a hingedextension arranged to yieldingly rest on the cover affording a1everacting thumb plece, pin when the valve is open to permit said 10said cover having a locking, and a sprmg valve to be set in diierentopen positions. I comiressed between the cover and body Intestimonvwhereof I aix my signature.

yiel ingly holding the cover with the lock lug Y 1n the path of movementof the pin to lock the JOSEPH WASELAK.

